Projector.



Patnted. Nov. 12, 1918 2 SHEETS-SHEET Inventor: John L.|-|al| J. L. HALL.

PROJECTOR.

APPLICATION FILED JUNE 20.1911.

7 His a ttornea.

J. L. HALL.

PROJECTOR.

APPLICATION FILED JUNE 20, 1917- 1,284,661. Patented Nov. 12,1918.

2 SHEETSSHEEI 2.

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' in azimuth which is a gear 39 formed on the ring 19 and to the rotatable base respectively. The shaft '29 is rotated from the shaft 14 by means of a bevel-gear 34. secured to the shaft 14 which meshes with a bevel-gear 35 on the lower end of the shaft 29.

It will be apparent that the reflected. beam can be directed to any desired elevated point in a plane at right angles to the axis of the searchlight by suitably rotating the plane mirror 21, and by combining with this movement the rotation of the searchlight. on the rotatable base about the vertical axis, the projected beam can be directed to any desired point, and this is accomplished with the barrel of the Searchlight in a horizontal position where the concave mirror will be kept free from particles falling from the carbons adjacent to the are. It will also be apparent that the beam can follow a plane through the zenith Without material change necessary Where the beam is trained direct in the usual Way.

Under some circumstances it is lound (lesirablc to embody my invention in Search lights of the usual type, that is'to say, searehlights which may be rotated in altitude about a horizontal axis, and in Figs. 4. 5 and 6 I have illustrated a construc tion by which this may be accomplished, and in which the searchliglit may also be rigidlv mounted on a rotatable base and used in the manner described in connection with Figs. 1. 2 and In the construction shown in Figs. 4, 5, 6, the scarchlight barrel is mounted on trunnions 37 carried by the standards 38 in the usual manner. The plane mir: or in front of the barrel is mounted in the same manner as in Figs. 1, 2 and 3, and is rotatable about the axis of the barrel, but in this case is preferably provided with p Which is cngflQGCl by a pinion 40, mounted on a shaft 41 (shown in dotted lines in Fig. 4) which is rotated "from a bevel-gear 49, the latter enaging the bevel-gear 35 on the operating shaft 36. Motion is. transmitted from the bevehgear 42 to the shaft 41 through bevelgears 43 and 44, shaft 45 and sprockets 4G and 47. mounted on the shafts 41 and 45 respectively, and a sprocket chain 48.

The shaft 36' is rotated by the motor 12 through a hollow shaft 49, surrounding the shaft 36, the two shafts being coupled to ,qether by means of a clutch 50 to Which is secured the hand Wheel l3. The motor shaft 14 carries a Worm (not shown) which engages the worm wheel 51 mounted on shaft 52. A pinion 53 mounted on this shaft 52 engages a gear 54 secured on the end of the shaft 49. A gear 55 is secured to the bevel-gear 35*, both of which are slidahly mounted on the shaft 36. A bevel-hub 56 is secured to the bevel-gear 35 and is engaged by a frict on clutch 57, which is held in engagement with the hub 5G by means of sothat there :1 spring 58 the outer end of the latter engaging a collar 59 secured on the shaft 36. 'l he shaft 36 together with the gears mounted thereon, is thus shit'table longitudinally and is held in either position by a latch 60 which engages grooves 61, formed in the shaft. The searchlig'ht may be rotated in a vertical plane by means of a rack 62 secured thereto, which is engaged by the pinion 55 when the shaft in which the pinion is mounted is shifted to the left as viewed in Figs. 5 and 6. mirror is to be used in conjunction with the searchlight, the barrel of the searchligght may be made rigid with the rotatable base by means of a strut 63 which is pivoted to the base 11' and is provided, at its end With a slot 64 engaging a pin 65 on the racl Nith the parts occupying the positions shown in Fig. 6 the bevel-gear 35* engages the bevel 42 and the plane mirror is rotated by the motor 12. When the scare light thus operated, the barrel is made rigid with the base by means of the strut 63 but two sources of control, viz: the control for the rotation of the base and that for the rotation of the plane mirror tor the operator to manipulate.

Now, it it is desiredto use the Searchlight in the ordinary manner by rotating it through a vertical plane combined wit the horizontal rotation on the base, the lane mirror 21 which is readily detachable from the searchlight, will lirst be removed and the hand Wheel 1 a d the. shaft 36 attached thereto will be shifted to the left, as viewed in Fig 6, thus bringing the gear 55 into engagement with the rack 62 and the move ment of the same operating member which has previously effected the rotation of the plane mirror about the axis of the search light, now causes the rotation of the searchlight in a vertical plane.

It will be apparent from the above description that the searchlight is in all cases rigidly mounted on a rotatable base near the plane mirror in :iront of the barrel of the searchlight, and that in every case there are but two controls for the operator to manipulate.

l i hile I have described. my invention as embodying a concrete structure and as op crating in a specific manner in accordance with the provisions of the patent statutes, it

should he understood thatI do not limit invention thereto, since various modifications thereof will suggest themsel es to those slrillcd in the art Without departin from the spirit of my invention, the scope o which is set forth in the annexed claims.

When the rotatable plane- What I claim as new and desire to secure the United States, is a rotatable base, a prosaid base and rofor making said by Letters Patent of i. in a projector. jcetor casing mounted on tat-able in azimuth, means casing rigid 0n the base, a mirrer arranged posed to the projeeted beam of li t, and means comprising a single shiftable operain front of the casing and ang 'ulgiy dising member for rotating the casing 11 altitude or for rotating the mirror about the axis of the searchlight;

In Witness whereof, I have hereunto; set my hand this 18th day of June, 1917.

JOHN L. HALL. 

